Function raxIteratorAddChars

rax.c:1529–1549

Append characters at the current key string of the iterator 'it'. This * is a low level function used to implement the iterator, not callable by * the user. Returns 0 on out of memory, otherwise 1 is returned. */

 * is a low level function used to implement the iterator, not callable by
 * the user. Returns 0 on out of memory, otherwise 1 is returned. */
int raxIteratorAddChars(raxIterator *it, unsigned char *s, size_t len) {
    if (len == 0) return 1;
    if (it->key_max < it->key_len+len) {
        int from_static = it->key == it->key_static_string;
        unsigned char *old = from_static ? NULL : it->key;
        size_t new_max = (it->key_len+len)*2;
        unsigned char *new_key = rax_realloc(old,new_max);
        if (new_key == NULL) {
            errno = ENOMEM;
            return 0;
        }
        it->key = new_key;
        if (from_static) memcpy(it->key,it->key_static_string,it->key_len);
        it->key_max = new_max;
    }
    /* Use memmove since there could be an overlap between 's' and
     * it->key when we use the current key in order to re-seek. */
    memmove(it->key+it->key_len,s,len);
    it->key_len += len;
    return 1;
}

/* Remove the specified number of chars from the right of the current
 * iterator key. */